Choi, Ye Won You, Ga Rim Lee, Myoung Mi Kim, Jinheung Jung, Kwang-Deog Kim, Cheal 2024-01-20T09:04:18Z 2024-01-20T09:04:18Z 2021-09-05 2014-08 1387-7003 https://pubs.kist.re.kr/handle/201004/126508 A new sensor 2-((E)-(3-(1H-imidazol-1-yl)propylimino)methyl)-5-(diethylamino)phenol (1) based on the combination of diethylaminosalicylaldehyde and imidazole groups was designed and synthesized as a Hg2+ selective calorimetric chemosensor. Upon treatment of 1 With mercury ions, sensor 1 showed a color-change from colorless to yellow in a mixture of H2O/DMF (5:95), while many other ions such as Al3+, Zn2+, Cd2+, Cu2+, Fe2+, Mg2+, Cr3+, Ag+, Co2+, Ni2+, Na+, K+, Ca2+, Mn2+ and Pb2+ had no influence. Notably, this chemosensor could distinguish clearly Hg2+ from Cu2+, Ag+, Fe2+ and Pb2+. The underlying signaling mechanism is a ligand-to-metal charge-transfer (LMCT) process. Compound 1 showed the serial formation of the 1:1 and the 1:2 complexation between 1 and Hg2+. This two-step binding mode was proposed based on the UV titration, H-1 NMR titration and ESI-mass studies. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER COLORIMETRIC SENSOR FLUORESCENCE SENSOR CHEMOSENSOR TRANSPORT MOLECULE HG2+ Highly selective recognition of mercury ions through the "naked-eye" Article 10.1016/j.inoche.2014.05.002 1 INORGANIC CHEMISTRY COMMUNICATIONS, v.46, pp.43 - 46 INORGANIC CHEMISTRY COMMUNICATIONS 46 43 46 scie scopus 000340309500012 2-s2.0-84901404109 Chemistry, Inorganic & Nuclear Chemistry Article COLORIMETRIC SENSOR FLUORESCENCE SENSOR CHEMOSENSOR TRANSPORT MOLECULE HG2+ Mercury ion Calorimetric Chemosensor Naked-eye detection LMCT process